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pro vyhledávání: '"Baschnagel J"'
Strain correlation functions in two-dimensional isotropic elastic bodies are shown both theoretically (using the general structure of isotropic tensor fields) and numerically (using a glass-forming model system) to depend on the coordinates of the fi
Externí odkaz:
http://arxiv.org/abs/2303.16910
Correlation functions of components of second-order tensor fields in isotropic systems can be reduced to an isotropic forth-order tensor field characterized by a few invariant correlation functions (ICFs). It is emphasized that components of this fie
Externí odkaz:
http://arxiv.org/abs/2303.16571
Publikováno v:
EPJE 45, 65 (2022)
Focusing on non-ergodic macroscopic systems we reconsider the variances of time averages time-series. The total variance (direct average over all time-series) is known to be the sum of an internal variance (fluctuations within the meta-basins) and an
Externí odkaz:
http://arxiv.org/abs/2208.08936
Publikováno v:
EPJE (2017) 40, 43
Focusing on simulated polymer glasses well below the glass transition, we confirm the validity and the efficiency of the recently proposed simple-average expression $G(t) = \mu_A - h(t)$ for the computational determination of the shear stress relaxat
Externí odkaz:
http://arxiv.org/abs/2201.13149
Publikováno v:
Soft Matter, 2017, 13, 2499-02512
Assuming Gaussian chain statistics along the chain contour, we generate by means of a proper fractal generator hyperbranched polymer trees which are marginally compact. Static and dynamical properties, such as the radial intrachain pair density distr
Externí odkaz:
http://arxiv.org/abs/2201.13141
Publikováno v:
Eur. Phys. J. E. (2021)44:125
We investigate simple models for strictly non-ergodic stochastic processes $x_t$ ($t$ being the discrete time step) focusing on the expectation value $v$ and the standard deviation $\delta v$ of the empirical variance $v[x]$ of finite time series $x$
Externí odkaz:
http://arxiv.org/abs/2111.11115
We investigate the standard deviation $\delta v(\tsamp)$ of the variance $v[\xbf]$ of time series $\xbf$ measured over a finite sampling time $\tsamp$ focusing on non-ergodic systems where independent "configurations" $c$ get trapped in meta-basins o
Externí odkaz:
http://arxiv.org/abs/2103.07195
Extending recent work on stress fluctuations in complex fluids and amorphous solids we describe in general terms the ensemble average $v(\Delta t)$ and the standard deviation $\delta v(\Delta t)$ of the variance $v[\mathbf{x}]$ of time series $\mathb
Externí odkaz:
http://arxiv.org/abs/2011.08686
Akademický článek
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Publikováno v:
Phys. Rev. E 98, 062502 (2018)
Using molecular dynamics simulation of a polymer glass model we investigate free-standing polymer films focusing on the in-plane shear modulus $\mu$ and the corresponding shear-stress relaxation modulus $G(t)$ as functions of temperature $T$, film th
Externí odkaz:
http://arxiv.org/abs/1809.02535